| A | B |
| albumin | A simple protein found in blood plasma |
| antibody | A protein produced in response to, and interacting specifically with, an antigen |
| antigen | A substance that induces the formation of antibodies |
| coagulation | The process of clot formation |
| erythrocyte | A red blood cell |
| fibrin | The protein that forms a clot in the process of blood coagulation |
| fibrinogen | The inactive precursor of fibrin |
| hemoglobin | The iron-containing pigment in red blood cells that transports oxygen |
| hemostasis | The stoppage of bleeding |
| immunity | The state of being protected against a specific disease |
| leukocyte | A white blood cell |
| lymphocyte | A lymphatic cell; a type of agranular leukocyte |
| phagocytosis | The engulfing of foreign material by white blood cells |
| plasma | The liquid portion of the blood |
| platelet | A formed element of the blood that is active in hemostasis; a thrombocyte |
| serum | The fraction of the plasma that remains after blood coagulation; it is the equivalent of plasma without its clotting factors |
| thrombocyte | A blood platelet |
| allergen | A substance that causes an allergic response |
| allergy | Hypersensititvity |
| anaphylactic reaction | An exaggerated allergic reaction to a foreign substance |
| anemia | A decrease in the number or size of red blood cells or int the amount of hemoglobin in the blood. May result from blood loss, malnutrition, a hereditary defect, environmental factors, and other causes. |
| aplastic anemia | Anemia caused by bone marrow failure resulting in deficient blood cell production, especially that of red cells. |
| autoimmune disorder | A condition in which the immune system produces antibodies against an individual's own tissues |
| hemolysis | The rupture of red blood cells and the release of hemoglobin |
| hemophilia | A hereditary blood disease caused by lack of a clotting factor and resulting in abnormal bleeding |
| leukemia | Malignant overgrowth of immature white blood cells. May be chronic or acute; may affect bone marrow (myelogenous leukemia( or lymphoid tissue (lymphocytic leukemia) |
| sickle cell anemia | A hereditary anemia caused by the presence of abnormal hemoglobin, Red blood cells become sickle-shaped and interfere with normal blood flow to the tissues. Most common in Mediterranean and African populations. |
| splenomegaly | enlargement of the spleen |
| thrombocytopenia | A deficiency of thrombocytes in the blood |
| agglutination | The clumping of cells or particles in the presence of specific antibodies |
| bilirubin | A pigment derived from the breakdown of hemoglobin. It is eliminated by the liver in bile. |
| heparin | A substance found throughout the body that inhibits blood coagulation; an anticoagulant |
| thrombin | The enzyme derived from prothrombin that converts fibrinogen to fibrin |
| erythrocytosis | Increase in the number of red cells in the blood |
| hematoma | A localized collecton of blood, usually clotted, caused by a break in a blood vessel |
| neutropenia | A decrease in the number of neutrophils with increased susceptibility to infection. Causes include drugs, irradiation, and infection. May be a side effect of treatment for malignancy. |